search for: disk_error

This patches add support for dynamic sectors to GPT MBR code. First 3 patches are trick and optimizations to gain some space for the forth patch. I have a modified version of SeaBIOS, some code and some script o test it I'll send on a different mail.

...k */ pushw %dx /* -22: High word */ pushw %ax /* -24: Low word */ /* * Load sectors. We do this one at a time mostly to avoid * pitfalls and to share code with the stock MBR code. */ movw $0x7c00, %bx movw $4, %cx /* Sector count */ movl (lba_offset), %eax 2: call read_sector jc disk_error incl %eax addb $(512 >> 8), %bh loopw 2b /* Dump out the bytes of the first sector. */ pusha mov $0x7c00, %di mov $16, %dx 2: mov $16, %cx 1: mov (%di), %al inc %di call print_al loop 1b call print_string .ascii "\r\n" dec %dx jnz 2b call print_string .ascii...

This set of patches add some support for sector size >512. Currently it fixes extlinux, MBR for GPT and ext partitions. Other code is unaffected. This set of patches has been tested on a read Dell machine running a beta firmware.

...tring .ascii "isolinux.bin missing or corrupt.\r\n" +boot_failure: + int $0x18 /* Boot failure */ +die: + hlt + jmp die + /* * read_sector: read a single sector pointed to by %eax to %es:%bx. * CF is set on error. All registers saved. @@ -266,15 +306,20 @@ read_common: ret disk_error: - call error + call print_string .ascii "Operating system load error.\r\n" + jmp boot_failure -/* - * Print error messages. This is invoked with "call", with the - * error message at the return address. +/* + * Print message. This is invoked with "call", with th...

...l -36(%bp) /* secpercyl */ shlb $6, %ah movb %ah, %cl movb %al, %ch xchgw %dx, %ax - divb -2(%bp) /* sectors */ + divb -32(%bp) /* sectors */ movb %al, %dh orb %ah, %cl incw %cx /* Sectors are 1-based */ @@ -275,7 +291,7 @@ read_common: leaw 16(%si), %sp /* Drop DAPA */ popal jc disk_error - addb $2, %bh /* bx += 512: point to the next buffer */ + addb -5(%bp), %bh /* bx += sector size: point to the next buffer */ /* fall through and increment sector number */ -- 1.7.5.4

...ONE, EXT2, BTRFS, VFAT, NTFS, + XFS, }; extern int fs_type; diff --git a/mbr/mbr.S b/mbr/mbr.S index b71cfb7..270a356 100644 --- a/mbr/mbr.S +++ b/mbr/mbr.S @@ -265,6 +265,19 @@ boot: movl %eax, 8(%si) /* Adjust in-memory partition table entry */ call read_sector jc disk_error + + /* Check if the read sector is a XFS superblock */ + cmpl $0x42534658, (bootsec) /* "XFSB" */ + jne no_xfs + + /* We put the Syslinux boot sector at offset 0x800 (4 sectors), so we + * need to adjust %eax (%eax + 4) to read the right sector into 0x7C00. + */ + addl $0x800 >> 0...